User's Manual

KAIROS User Manual - version 1.3
Radio Activity S.r.l. 12/11/2014 12 / 41
TX2: it reports the 12,8MHz Reference clock status as follow:
Slow
green
flashing
Reference clock is ok
fast
red
flashing
Reference clock is absent
Finally, a correct equipment startup should happen as follow:
1) Supply led becomes green pressing the on/off button
2) RX1 flashes fast red/green for less than 1 sec
3) RX1 – RX2 – TX1 – TX2 led continue to alternate on/off red/green, moving left and right for 10-15
sec
4) RX1 – RX2 – TX1 – TX2 led go off for 1 sec and then start to indicate the DSP booting phase as
described in the next paragraph
3.2.2 DSP booting phase
Once the LINUX O.S. is ready, the DSP starts. This condition is indicated by all Radio Led off condition and
the ending of the alternate on/off red/green, moving left and right indication.
DSP starts to check all its internal peripherals and report results on the Radio Led, step by step, as follow:
1. It verifies the FPGA to DSP communication and the status of all essential internal signals. If the
result is ok, the Radio Led “TX2” becomes green and the DSP go to the next step.
2. The DSP checks audio peripherals, closing them in both digital and analog loops. If the result is ok,
the Radio Led “TX1” becomes green and the DSP go to the next step. If the result is fail, the Radio
Led “TX1” becomes red and the DSP stops. The LINUX processor should start the DSP again in 5-10
sec. This condition (DSP continuous restarting) is maintained until this test is surpassed. If this
condition appears, it’s very probable an HW problem. Please contact Factory for repairing the unit.
3. The DSP programs and checks IF peripherals. If the result is ok, the Radio Led “RX2” becomes green
and the DSP go to the next step. If the result is fail, the Radio Led “RX2” becomes red and the DSP
stops. The LINUX processor should start the DSP again in 5-10 sec. This condition (DSP continuous
restarting) is maintained until this test is surpassed. If this condition appears, it’s very probable an
HW problem on RX parts. Please contact Factory for repairing the unit.
4. The DSP calibrates the IF and internal DAC/ADC.
5. DSP requests to LINUX the EEP saved setup parameters. When all parameters are correctly
received, the Radio Led “RX1” becomes green and the DSP go to the next step.